People are entitled to their opinions, whether it is right or wrong to voice them in certain situations is questionable. But, this is an online forum. If your being offended by people saying "puking 13 year olds", this will become a good wake-up call for when you reach the real world. Stereotypes can be applied to anyone and most people do them unknowingly. You just have to accept the fact that people will think what they want and you have to be the better person by just shrugging it off.
I don't feel like I'm treated differently here and I'm 17. Its how you respond and react when certain situations occur. Even I'm guilty of loosing my cool and snapping on another member or troll. Which I'm usually remorseful for later (if it was a member).
My opinion on the puking comment, is that I'm not offended by it. To be honest I wouldn't even consider it a stereotype since its not accurate at all. Was he implying we all drink underage and can't hold our liquor or that we are all anorexic?
Regardless, this is my 2 cents
Tyler